{"id":"CVE-2021-43240","aliases":["EUVD-2021-30184","GHSA-gqqh-5jqj-j85x"],"status":"published","title":"NTFS Set Short Name Elevation of Privilege Vulnerability","description":"NTFS Set Short Name Elevation of Privilege Vulnerability","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00571,"percentile":0.47672,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269"],"published":"2021-12-15T14:15:22Z","modified":"2026-06-17T04:10:43Z","products":[{"vendor":"microsoft","product":"windows 10 version 1909"},{"vendor":"microsoft","product":"windows 10 version 2004"},{"vendor":"microsoft","product":"windows 10 version 20h2"},{"vendor":"microsoft","product":"windows 10 version 21h1"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 11 version 21h2"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server version 2004"},{"vendor":"microsoft","product":"windows server version 20h2"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_11"},{"vendor":"microsoft","product":"windows_server"},{"vendor":"microsoft","product":"windows_server_2016"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43240","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43240"},{"url":"https://github.com/advisories/GHSA-gqqh-5jqj-j85x"}],"sources":{"cve":[{"id":"CVE-2021-43240","title":"NTFS Set Short Name Elevation of Privilege Vulnerability","description":"NTFS Set Short Name Elevation of Privilege Vulnerability","status":"published","published":"2021-12-15T14:15:22Z","modified":"2024-08-04T03:55:27.419Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30184","description":"NTFS Set Short Name Elevation of Privilege Vulnerability","status":"published","published":"2021-12-15T14:15:22Z","modified":"2024-08-04T03:55:27Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T03:24:14.796505Z"}],"ghsa":[{"id":"GHSA-gqqh-5jqj-j85x","title":"NTFS Set Short Name Elevation of Privilege Vulnerability","description":"NTFS Set Short Name Elevation of Privilege Vulnerability","status":"published","published":"2021-12-16T00:01:52Z","modified":"2023-02-01T05:06:50Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:50:26.062502Z"}],"nvd":[{"id":"CVE-2021-43240","description":"NTFS Set Short Name Elevation of Privilege Vulnerability","status":"published","published":"2021-12-15T15:15:10.317Z","modified":"2026-06-17T04:10:43.327Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}